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Taxa

Hydrozoa

Class

A diverse cnidarian class whose life cycle, in most species, alternates between a colonial polyp stage and a free-swimming medusa stage, though many species have lost one stage or the other. Hydrozoa includes the freshwater Hydra used widely in developmental biology research, and the Portuguese man o' war, actually a colony of specialized individuals rather than a single organism.

Facts
Disputed
Member Species/Taxa Count
3600 2
Approximate described-species (or, for a genus, described-taxon) count; continually revised as species are newly described, reclassified or synonymized.
Taxonomic Rank
Class 2
Scientific Name
Hydrozoa 2
Classification
Living or Extinct
Yes 1
Connections

Child Taxon Of

Cnidaria, Taxa
Source Catalogue of Life

Parent Taxon Of

Aequorea victoria, Species
Source Wikidata: Aequorea victoria
Fire Coral, Species
Source Wikidata: Fire Coral
Freshwater Jellyfish, Species
Source Wikidata: Freshwater Jellyfish
Immortal Jellyfish, Species
Source Wikidata: Immortal Jellyfish
Obelia Geniculata, Species
Source Wikidata: Obelia Geniculata
Portuguese Man o War, Species
Source Wikidata: Portuguese Man-of-War
Portuguese Man-of-War, Species
Source Wikidata: Portuguese Man-of-War
Sources
1. Wikidata (taxon extant/extinct status)
Wikimedia Foundation / Wikidata contributorsQ181989, descriptionView the Source
2. Catalogue of Life
Species 2000 & ITIS Catalogue of LifeView the Source
Wikidata: Hydrozoa
Wikidata Q181989, class allow-list match (w-wdresolver-0926)View the Source
Wikidata: Portuguese Man-of-War
  • Parent Taxon Of: Portuguese Man-of-War, Wikidata parent-taxon (P171) chain
  • Parent Taxon Of: Portuguese Man o War, Wikidata parent-taxon (P171) chain
View the Source
Wikidata: Immortal Jellyfish
Parent Taxon Of: Immortal Jellyfish, Wikidata parent-taxon (P171) chainView the Source
Wikidata: Fire Coral
Parent Taxon Of: Fire Coral, Wikidata parent-taxon (P171) chainView the Source
Wikidata: Freshwater Jellyfish
Parent Taxon Of: Freshwater Jellyfish, Wikidata parent-taxon (P171) chainView the Source
Wikidata: Obelia Geniculata
Parent Taxon Of: Obelia Geniculata, Wikidata parent-taxon (P171) chainView the Source
Wikidata: Aequorea victoria
Parent Taxon Of: Aequorea victoria, Wikidata parent-taxon (P171) chainView the Source
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